I had one drop from from a NON-FABLED, Vekerchiki Warrior. It was a dark blue con to a level 85. On a side note I haddent seen any fabled mephit models in earth on Druzzil Ro in about 5 days, Im guessing its bugged atm.

Dropped from 'Fabled Earthcrafted Assassin' in plane of earth. yellow con to 80. Rampages about as often as air one but hits you twice. Comes with an add. Spawned at the very start of the steps to the big corc. max hit on my pet was 2465.